On 10 May 1940 the incomplete Isaac Sweers was towed to England by the Dutch tug Zwarte Zee, arriving the next day on the Downs and one 12 May in Spithead to be completed at the John I. Thornycroft Dockyard, Southampton
commissioned on 29 May 1941 under Cdr J. Houtsmuller
On 24 June, the destroyer left Southampton for Greenock via Plymouth and the Channel of Bristol to conduct trials there. On 5 July, continued to Scapa Flow, where her crew was trained and was then allocated to the 19th destroyer flotilla in Greenock, which had a the task to escort troopship convoys southward. In August 1941, HMNS Isaac Sweers escorted the convoy WS-10 and on the way back, covered the Dutch tug Zwarte Zee during her attempt to salvage the Cape Rodney, which had been torpedoed by U-75(Ringelmann) on 5 August. It failed and the ships returned to base. During another escort mission, the destroyer collided on 14 September with the British destroyer HMS Brocklesby and sustained some minor damage to her starboard propellor.

On 17 Sepember 1941, HNMS Isaac Sweers left Greenock together with British destroyers HMS Laforey, HMS Lively and HMS Oribi to take part in Operation Halbert, a supply convoy to Malta. During the voyage, the destroyer was ordered to escort the British battleship HMS Rodney to Gibraltar, together with the Polish destroyers ORP Garland and ORP Piorun, arriving at Gibraltar on 24 September. The destroyers left the harbour in the evening westward as escort for the British battleship HMS Nelson. After a few hours, the Task Force changed course to the Strait of Gibraltar, which they passed at night. The Admiralty hoped that the Germans will believe that HMS Rodney had just relieved HMS Nelson at Gibraltar. On 25 September, they met the rest of the convoy, which was attacked two days later by torpedo aircraft. Isaac Sweers was missed by torpedo which passed 30 meters off the bow, but the HMS Nelson was hit by a second wave, developed a list to the bow and returned to Gibraltar. Two men on the destroyer were wounded during the battle by shell fragments. At about 15.00 hours, the British battleship HMS Prince of Wales, HMS Rodney, two cruisers and six destroyers (among them the HNMS Isaac Sweers) were ordered to engage Italian warships reported about 70 miles away, but the Italians avoided contact and the ships returned to the convoy shortly afterwards. During the following night the convoy was again attacked by torpedo aircraft near Sicily, loosing one transport. On 28 September, Force H (to which the Dutch destroyer belonged) changed course back for Gibraltar. At 06.17 hours on the next day, HMS Gurkha got a radar contact with the surfaced Italian submarine Diaspro in 37º32'N/06º45'E and was shortly thereafter missed by two torpedoes, which passed under the destroyer. Together with the Dutch destroyer, she engaged the submarine, but without result. On 1 October, HNMS Isaac Sweers arrived back in Gibraltar.

In October 1941 HNMS Isaac Sweers escorted convoys on the Freetown - Gibraltar route and then joined Force H (HMS Malaya, HMS Hermione and six destroyers) at Gibraltar for Operation Perpetual, to transport 37 Hurricane fighters on the British carriers HMS Ark Royal and HMS Argus to Malta. On 10 November 1941, Force H left Gibraltar and the carriers launched the aircraft two days later, after which the Task Force returned to Gibraltar. But on 13 November, HMS Ark Royal (91) was torpedoed by U-81 (Guggenberger ) and sank the next day.

On 26 November 1941, HNMS Isaac Sweers was allocated to the 19th Destroyer Flotilla, Group I and conducted anti-submarine patrols west of Gibraltar. On 11 December, the ship was scheduled to return to England for an overhaul, but received orders to leave Gibraltar for the Eastern Mediterranean instead. The destroyer was attached to the 4th Destroyer Flotilla under Cdr Stokes on board the British destroyer HMS Sikh and left Gibraltar in the evening. During the night, they received a radio message from a patrolling Wellington aircraft about two Italian light cruiser steaming southwards. The destroyers steamed with 30 knots through the Skerki-channel and spotted several lightflashes and vague silhouettes near Cape Bon at about 02.00 hours. The flotilla rounded the Cape and sighted the two approaching Italian light cruisers Alberico da Barbiano and Alberto di Giussano. HMS Sikh was leading the group, then HMS Legion, HMS Maori and finally HNMS Isaac Sweers. Two of the four fired torpedoes from the leading destroyer struck the first cruiser, which was also hit by one torpedo of and gunfire from HMS Legion and another torpedo from HMS Maori. The cruiser was ablaze and quickly started to sink. The second cruiser opened fire but missed and was then sunk by one torpedo from HMS Legion and the concentrated gunfire by all destroyers. The HNMS Isaac Sweers then encountered the Italian torpedoboat Cigno, which was attacked by gunfire and missed with four torpedoes. The destroyer reported also the sinking of an Italian MTB, but this was not confirmed by the Italian Admiralty. The Allied destroyers arrived at Malta on 13 December.

A few days later, the destroyers left Malta together with the Force K to met the fast transport Breconshire, which had left Alexandria on the 15 December. In the early morning of 17 December, they met the transport and her escort. The convoy was attacked by aircraft numerous times between 13.00 and 18.00 hours, but sustained no losses. In the evening, a Italian fleet of four battleships, numerous cruisers and destroyers approached the convoy and opened a well-aimed fire at about 14 miles. At the same time the aircraft attacks continued and one was shot down by the Dutch destroyer. The convoy changed course to the south and the destroyers and the cruisers of Force K later turned around to attack the enemy fleet with torpedoes. But the Italians were already steaming back to their harbours. The convoy reached Malta on 18/19 December, but the Dutch destroyer left Malta for Alexandria soon afterwards. On 24 December, Cdr W. Harmsen took over the command from Cdr J. Houtsmuller.

On 16 January 1942, HNMS Isaac Sweers left Alexandria with three destroyers to escort the convoy MW-8B, consisting of four merchants, to Malta. At 07.35 hours on 17 January, HMS Gurkha was torpedoed by U-133 (Hesse) and caught fire. HNMS Isaac Sweers towed the destroyer free from the burning oil on the surface and took over the most crew members. The damaged destroyer had to be scuttled. The Dutch destroyer was ordered to put the survivors ashore in Tobruk, arriving in the evening and returned to the convoy at 02.00 hours on 18 January, which arrived at Malta unharmed.

On 23 January, HNMS Isaac Sweers was sent to the Netherlands East Indies, because of the Japanese advances in that area, arriving on 8 February in Colombo, where she went into the drydock for some minor repairs and maintenance. She departed on 28 February, but was ordered back shortly thereafter, because the Netherlands East Indies were already lost and the destroyer was attached on 15 March to the British Eastern Fleet, arriving on 5 April at the Addu Atoll for refueling. The same day, she left together with the Force B to find a Japanese carrier fleet, which was operating in the Indian Ocean. The Japanese attacks on Colombo, Trincomalee and several ships in the Indian Ocean were successful, but the Force B was not able to find the attackers and arrived on 14 April in Bombay. On 30 April, the Force B arrived at the Seychelles and was based at Mombasa on 22 May, while HNMS Isaac Sweers left for England via Durban, Simonstown, Freetown and Gibraltar. On 1 June, the Cdr W. Harmsen was promoted to Captain.

From June to September 1942, the destroyer was overhauled at the Thornycroft Dockyard, Southampton. The .50cal MG´s were replaced by 20mm Oerlikon AA guns and her DC-equipment was augmented. A new Asdic-type was also installed. The overhaul was followed by a practice period in Scapa Flow. In October 1942, the destroyer was part of the escort for the British carrier HMS Furious to Gibraltar. HNMS Isaac Sweers left Gibraltar together with the British destroyers HMS Escapade and HMS Marne for Punta Delgada on the Azores. On 29 October 1942, the destroyers departured for a rendez-vous with the troop convoy KMF-1, part of Operation Torch, the invasion of North Africa. But the destroyers missed the rendez-vous point as a result of a mistake made in deciphering a signal and remained near Gibraltar until they became part of the Force H.
On 11 November, HNMS Isaac Sweers and the British destroyer HMS Porcupine were ordered to pick up the survivors from the troop transport Nieuw Zeeland, which had been sunk by U-380, and take them to Gibraltar.
In the evening of 12 November 1942, HNMS Isaac Sweers (Capt. Willem Harmsen, R.Neth.N.) refueled at sea from a fleet oiler of the Force R (two oilers and four armed trawlers). She was ordered to cover the oilers until the morning and then return to the Force H. At 06.15 hours on 13 November, the destroyer was hit by two torpedoes from U-431 on the starboard side in position 37º23'N, 02º12'E. One torpedo struck a oil tank, spreading burning oil over the ship and the water. The second torpedo hit the longroom and officers quarters, killing all 13 officers sleeping there. The survivors were picked up by the British armed trawler HMS Loch Oskaig, which also tried to get alongside the burning ship, but did had to abandon the plan due to the heavy fires and exploding ammunition.

Notable events involving Isaac Sweers include:

15 Aug 1941

Convoy WS 10X

This convoy departed U.K. ports on 14/15 May 1941 for Suez where the ships arrived between 1 to 4 October 1941.

The convoy assembled in the Clyde area on 15 May 1941.

The convoy was made up of the following troop transports; Brisbane Star (12791 GRT, built 1937), Orion (23371 GRT, built 1935), Strathmore (23428 GRT, built 1935), Strathnaver (22283 GRT, built 1931), And the transports Palma (5419 GRT, built 1941) and Port Jackson (9687 GRT, built 1937).

When approaching Freetown the convoy was joined on 26 August by a local escort made up of the destroyers HMS Brilliant (Lt.Cdr. F.C. Brodrick, RN), HMS Velox (Lt.Cdr. E.G. Roper, DSC, RN) (left the convoy before noon on 27 August), HMS Wrestler (Lt. E.L. Jones, DSC, RN) and the corvettes HMS Clematis (Cdr. Y.M. Cleeves, DSO, DSC, RD, RNR) and HMS Crocus (Lt.Cdr. E. Wheeler, RNR). The convoy arrived at Freetown on 28 August 1941.

The convoy departed Freetown for Capetown on 1 September 1941. Escort was now provided by the battleship HMS Revenge (Capt. E.R. Archer, RN). The convoy arrived at Capetown on 11 September 1941.

The convoy departed Capetown for Suez on 14 September 1941. Escort was still provided by HMS Revenge until 22 September 1941 when the light cruiser ), HMS Ceres (Capt. E.G. Abbott, AM, RN) took over until the dispersal of the convoy on 27 September 1941 when it was near Aden. The ships of the convoy then continued independently towards Suez where they arrived between 1 and 4 October 1941.

Most of the ships of this convoy were to form the convoy for operation Halberd from Gibraltar to Malta. The following ships made only the passage to Gibraltar with convoy WS 11X; HMS Princess Beatrix, HMS Queen Emma, HMS Royal Scotsman, HMS Ulster Monarch and Leinster.

In the evening of the 19th (2115 hours, B.S.T.) the destroyers HMS Havelock and HMS Harvester were detached from the convoy to escort the liner (troopship) Stratheden (23722 GRT, built 1937) all the way to Halifax. Until that moment the Stratheden had also been part of convoy WS 11X. The position in which these ships were detached was 50°57'N, 24°55'E.

On 21 September the convoy was joined by three destroyers coming from Gibraltar; HMS Zulu (Cdr. H.R. Graham, DSO, RN), HMS Lance (Lt.Cdr. R.W.F. Northcott, RN), HMS Gurkha (Cdr. C.N. Lentaigne, RN). These destroyers had sailed from Gibraltar on the 18th.

Also sailed from Gibraltar on the 18th was the British aircraft carrier HMS Furious (Capt. A.G. Talbot, DSO, RN) escorted by the British destroyers HMS Foresight (Cdr. J.S.C. Salter, RN), HMS Forester (Lt.Cdr. E.B. Tancock, DSC and Bar, RN), HMS Fury (Lt.Cdr. T.C. Robinson, RN) and HMS Legion (Cdr. R.F. Jessel, RN) to provide cover for the convoy. Following this HMS Furious was then to proceed to Bermuda and finally to the US for a refit. The destroyers then made rendes-vous with the British battleship HMS Rodney (Capt. J.W. Rivett-Carnac, DSC, RN) coming from a refit in the United States. They then provided cover for the convoy joining it around 1200/21. Shortly after Rodney had joined the convoy HMS Prince of Wales left the convoy for Gibraltar escorted by HMS Laforey, HMS Lightning and HMS Oribi. They arrived at Gibraltar to fuel late on the 23th. They departed Gibraltar around 0400/24 and rejoined the convoy west of Gibraltar around 1200/24. Before Prince of Wales rejoined the convoy HMS Rodney had departed the convoy and also headed for Gibraltar escorted by the destroyers ORP Piorun, ORP Garland and HrMs Isaac Sweers. Rodney and her escorting destroyers arrived at Gibraltar at 0900/24. In the evening of the 24th, HMS Nelson sailed westwards escorted by the same destroyers that had brought HMS Rodney in giving the German and Italian spies across the Bay in Spanish Algeciras the impression that HMS Rodney had just relieved HMS Nelson as flagship of Force H. This diversion seemed to have had the desired effect. During the night HMS Nelson and her escorting destroyers reversed course and passed the Straits of Gibraltar to the eastward unseen after dark.

On the 20th the British light cruiser HMS Sheffield (Capt. A.W. Clarke, RN) and the British destroyer HMS Lively (Lt.Cdr. W.F.E. Hussey, DSC, RN) also departed Gibraltar to provide cover for the convoy.

On the 21th the cruisers HMS Kenya and HMS Euryalus departed the convoy for Gibraltar where they both arrived at 2300/22. After fuelling they departed before daylight on the 23th to rejoin the convoy to the west of Gibraltar.

The remainder of convoy WS 11X, made up of transport ships Ajax (7797 GRT, built 1931), City of Calcutta (8063 GRT, built 1940), City of Lincoln (8039 GRT, built 1938), Clan Ferguson (7347 GRT, built 1938),
Clan Macdonald (9653 GRT, built 1939),
Dunedin Star (11168 GRT, built 1936), Imperial Star (12427 GRT, built 1934),
Rowallan Castle (7801 GRT, built 1939) and
HMS Breconshire (9776 GRT, built 1939) (Capt.(ret.) C.A.G. Hutchison, RN),
with the escort, organised in two groups one mile apart, and led by the Vice Admiral, 2nd in Command, Home Fleet in HMS Prince of Wales, and the Rear Admiral commanding 18th Cruiser Squadron in HMS Edinburgh respectively, passed south of Europa Point at 0130/25. This disposition was adopted to reduce the frontage of the convoy during its passage through the Straits.

At 0730/25 HMS Rodney, HMS Ark Royal and their screening destroyers were sighted from HMS Nelson at a range of about 10 nautical miles. Half an hour later the convoy and its escort was sighted.

At 1700/25 (time zone -2) HMS Duncan obtained an Asdic contact in position 36°36'N, 01°58'W and attacked with a pattern of four depth charges (more were intended but the starboard thrower failed to fire. Another depth charge attack was carried out by HMS Grukha at 1716 hours. She dropped a pattern of fourteen depth charges. HMS Duncan attacked again at 1750 hours with a second depth charge pattern. Both destroyers then proceeded to rejoin the screen at 1758 hours. Both ships sighted bubbles rising to the surface possibly from a damaged submarine.

Meanwhile on the 25th all destroyers of group 2 were fuelled by RFA Brown Ranger but not without delay as Brown Rangers speed was slower then anticipated and she was therefore further to the west then anticipated. This resulted in that not all destroyers were back in position at dusk. HMS Oribi was unable to find group 2 during the night and joined up with group 1 until daylight of the 26th when she rejoined group 1.

Events of group 1 and group 2 during 26 September

At 0932/26 lookouts on HMS Nelson spotted an Italian aircraft shadowing group 1 at a range of 10 miles. The aircraft was flying very low and had not been picked up by RDF. The fighters from HMS Ark Royal that were in the air failed to intercept this aircraft due to failure of the R/T equipment in the flight leaders aircraft. An enemy report from the aircraft was intercepted at 0935 hours. A re-broadcast of this signal by an Italian shore station was picked up 20 minutes later.

At 1300 hours Group 1 reversed course to close the distance to group 2 and HMS Hermione was stationed astern of HMS Ark Royal for RDF purposes and to give additional AA protection to the carrier.

At 1537 hours two aircraft were sighted low down to the eastward by HMS Zulu, HMS Nelson and HMS Hermione. These aircraft were at first thought to be Hudsons but turned out to be enemy when a signal they made was intercepted. By now it was too late to vector fighters towards them.

Movements of group 1 and group 2 and enemy air attacks during 27 September.

Around 0730/27 group 1 and 2 joined. HMS Ark Royal was now protected by HMS Euryalus (ahead) and HMS Hermione (astern) as close escort. Four Fulmar fighters were flown off at 0800 hours. This number was increased to ten at 1000 hours and twelve at 1100 hours and finally to sixteen at 1200 hours when it was though most likely air attacks might develop due to the fact the the forcehad been shadowed and reported by enemy aircraft from at least 0810 hours.

At 1255 hours RDF picked up enemy aircraft formations closing in on the convoy, one from the north and one from the east, both 30 miles distant. Position was 37°48'N, 08°50'E. Fighters were vertored towards these formations and one enemy aircraft was shot down at 1300 hours. Six enemy torpedo bombers approached from the port bow and beam of the convoy. Two were shot down at 1302 hours, most likely by AA fire from HMS Rodney and HMS Prince of Wales. An unknown number of torpedoes were dropped by the other aircraft. No hits were obtained but HMS Lance was narrowly missed by two of these torpedoes. HrMs Isaac Sweers was missed with one torpedo by 30 yards and HMS Rodney by one torpedo by 100 yards. One of the attacking aircraft was shot down by the destroyers while another torpedo bomber meanwhile was shot down by the Fulmars from the Ark Royal. Finally at 1310 hours a Fulmar was accidentaly shot down by HMS Prince of Wales. The first attack was was now over.

At 1327/27 RDF reported a group of aircraft splitting into two formations and approaching from the east. Destroyers on the starboard wing of the screen opened fire at 1329 hours when six or seven torpedo bombers (BR 20's) were seen approaching very low from the starboard bow and beam. Position was 37°49'N, 08°58'E.

Three of these aircraft pressed on through the barrage put up by the destroyers and made a most determined attack on HMS Nelson who was swinging to starboard to comb the tracks. On aircraft dropped its torpedo out 450 yards 20° on Nelson's starboard bow passing over the ship at a height of 200 feet. This aircraft was almost certainly shot down astern of HMS Nelson by HMS Sheffield and HMS Prince of Wales. The track of the torpedo was not seen until about 150 yards ahead of the ship and no avoiding action was possible and the torpedo hit HMS Nelson on the port bow 10 feet below the waterline. The speed of HMS Nelson was reduced to 18 knots.

The second aircraft of this formation missed HMS Nelson with its torpedo by about 100 yards while the third aircraft was claimed to have been shot down by HMS Laforey. It's W/T operator, the only one of the crew alive but wounded, was picked up by HMS Forester.

Three or four aircraft from this group attacked from the starboard quarted but without result.

One torpedo bomber was shot down by the Fulmars at 1336 hours. One of the Fulmars was now shot down by mistake by pompom fire from HMS Rodney but the crew was rescued by HMS Duncan.

At 1345 hours the third attack started. RDF reported a group coming in from the south-west. Ten or eleven S.79's split into two groups and were seen coming in low over the water and were taken under fire from the escorting ships on the starboard side of the convoy. Seven or eight of the attackers then retired to the south-west and disappeared but three others tried to work round the starboard bow of the convoy which then turned ay 60° to port. The three attackers were then driven off by gunfire from the destroyer screen and dropped their torpedoes at long range but one torpedo narrowly missed HMS Lightning. One of these aircraft was shot down by a Fulmar as it retired. Position of this attack was 37°50'N, 09°06'E.

At 1354 hours three of the aircraft that had initialy turned away returned from astern. Two of these retired again on being fired at but the third pressed on to attack HMS Ark Royal but it was shot down by AA fire from that ship and HMS Nelson before it had dropped it's torpedo.

At 1358 hours one aircraft, seen right ahead of HMS Nelson, dropped a torpedo outside the screen. HMS Cossack was able to avoid this torpedo by the HE of this torpedo being picked up by her Asdic set.

Attempt to intercept the Italian battlefleet

While the third air attack was still in progress at 1404 hours an emergency report was received from an aircraft operating from Malta that it had sighted two Italian battleships and eight destroyers in position 38°20'N, 10°40'E steering a course of 190° at 20 knots at 1340 hours. The position of HMS Nelson when this report was received was 37°46'N, 09°04'E so the enemy was only 70-75 miles away. At this time HMS Nelson, with it's gun armament unimpaired was thought to be capable of 18 knots or more. Admiral Sommerville decided to proceed towards the enemy at best speed with HMS Nelson, HMS Prince of Wales, HMS Rodney and the destroyers HMS Duncan, HMS Gurkha, HMS Lance, HMS Lively, HrMs Isaac Sweers and ORP Garland, leaving HMS Kenya, HMS Edinburgh, HMS Sheffield and ten destroyers with the convoy. HMS Euryalus, HMS Hermione and the destoyers HMS Piorun and HMS Legion remained with the Ark Royal.

It was also decided to fly off two Swordfish aircraft from the Ark Royal to take over shadowing duties from the aircraft operating out of Malta and to arm and fly off air striking force as soon as possible.

Ark Royal launched the two Swordfish at 1448 hours. It was intended to have launched them earlier but the launch was delayed due to the main armamant of HMS Ark Royal being in action and the recovery of two Fulmar fighters which were short on fuel.

In the meantime, at 1425 hours, the aircraft that was in contact with the Italians now also reported four cruisers and eight destroyers 15 nautical miles west-south-west of the enemy battlefleet. They were steering the same course and speed.

Meanwhile, at 1417 hours, the battleships had been ordered to form on HMS Nelson who had increased speed and proceeded ahead of the convoy. However at 1433 hours it became necessary for HMS Nelson to reduce speed to avoid further flooding due to the damage sustained. The Vice Admiral, 2nd in Command, Home Fleet in HMS Prince of Wales was now ordered to proceed with his flagship, HMS Rodney, HMS Edinburgh, HMS Sheffield and six destroyers to close the enemy at best speed. HMS Nelson meanwhile took station astern of the convoy.

While these instructions were carried out a report was received that the enemy had reversed course to 360°. This was followed by a further report that the enemy was steering 060°. Also a report was received that the battleships were of the Littorio class and not Cavour's as was previously believed. It was now clear that the enemy tried to avoid contact. It was still hoped that a striking force from HMS Ark Royal would be able to inflict damage to the enemy and reduced his speed allowing our battleships to overtake him before dark.

At 1530 hours a Fulmar fighter which was short of fuel force landed on the water astern of the Ark Royal. The crew was picked up by ORP Piorun.

At 1540 hours, HMS Ark Royal launched her stiking force of twelve Swordfish and four Fulmars. These aircraft did not find the enemy force and all aircraft returned to HMS Ark Royal around 1900 hours.

Between 1620 and 1645 hours, Fulmars from the CAP drove off an air attack threatening from the port side of the convoy. Later a shadowing enemy aircraft was shot down by Fulmars.

At 1658 hours, the Vice Admiral, second in Command Home Fleet, was ordered to reverse course and rejoin the convoy which was done at 1851 hours. No further reports of the enemy had been received for almost two hours and even if the striking force from HMS Ark Royal was able to inflict damage on the enemy these could not be intercepted before dark.

Between 1915 and 1930 hours enemy aircraft twice approached the convoy but turned away after fire had been opened on them. They were probably CR.42 fighters.

Night T/B attack on Force X and the convoy and loss of the Imperial Star.

Between 2000 and 2040 hours four torpedo bomber attacks were made on the convoy and Force X from the port beam, two or three aircraft taking part in each attack. The first two attacks had no result for the Italians.

During the third attack the two rear ships in the port column of the convoy collided with each other, these were the Rowallan Castle and the City of Calcutta. No serious damage was sustained and both were able to proceed on their way.

During the fourth attack, at 2032 hours, in position 37°31'N, 10°46'E the Imperial Star was struck by a torpedo on her port side aft. HMS Oribi was also attacked and narrowly missed by a torpedo four minutes later. She was able to shoot down the aircraft that had dropped this torpedo with her pompom and oerlikons.

When the Imperial Star was torpedoed it is probable that the explosion blew away both propellers and her rudder. In addition no.6 hold and the after engine room were both flooded.

HMS Heythrop, the rear ship of the port screen, proceeded alongside, but did not attempt to take Imperial Star in tow as she did not consider she was a suitable vessel to do so.

About 2045 hours HMS Oribi was ordered by HMS Euryalus to go to the assistance of the Imperial Star. When Oribi closed Heythrop was already standing by, and while Heythtop took off the passengers of the Imperial Star, HMS Oribi proceeded alongside to receive a report of the damage. It was decided to attempt to tow her to Malta.

For two hours the most determined attemps were made by HMS Oribi to tow the Imperial Star to Malta and although a speed of 8 knots was obtained nothing could be done to prevent her steering in circles. At is thought that her damaged stern was now acting as rudder.

Eventually, at 0120/28, HMS Oribi found herself being dragged stern first by her tow sheering off and she was forced to slip the tow. Oribi went alongside to consult again and it was reluctantly decided that there was no other choice then to scuttle the ship. Three depth charges were placed lashed together abreast a bulkhead and these were fired by a safety fuse.

HMS Oribi cast off 0340/28 and the depth charges were fired eleven minutes later, starting a large fire aft. As this did not spread quickly, Oribi shelled Imperial Star with 4.7" S.A.P. shells. Oribi finally left her at 0452 hours. Imperial Star was by that time heavily on fire fore and aft and listing badly. Aircraft from Malta could not find the wreck of the Imperial Star so there is no doubt that she sank.

HMS Oribi then made off from the scene along the convoy route at 32 knots and came with them near Malta 1215/28 having passed unmolested within 7 nautical miles from the Sicilian coast in daylight.

Passage of the convoy and Force X through the narrows.

In the meantime the convoy and Force X had proceeded through the narrows along the south coast of Sicily.

In the meantime. at 2030/27, HMS Hermione had departed the convoy to carry out a bombardment of Pantellaria harbour. Having completed the bombardment HMS Hermione rejoined Force X at 0615/28. At daylight HMS Farndale and HMS Heythrop were detached to fuel at Malta.

Although several formations of enemy aircraft were detected between dawn and the arrival of the convoy at Malta, the excellent protection given by shore based fighters from Malta prevented any attack from developing.

At 0800/28 a report was received that no enemy surface forces were reported near the convoy. The cruisers HMS Kenya, HMS Sheffield, HMS Euryalus and HMS Hermione then proceeded ahead to Malta to fuel where they arrived at 1130 hours. THe remainder of Force X and the entire convoy, with the exception of the Imperial Star, arrived later in the afternoon.

Movements of Force A during 28 September.

While Force X and the convoy continued on to Malta, Force A proceeded to the west at 14 knots, which was the best speed of HMS Nelson at that time.

At 0725/28 HMS Ark Royal flew off one A/S patrol and three fighters. At 0812 hours one enemy shadower was seen but it escaped into a cloud.

At 1025 hours HMS Nelson sighted a Cant. 506 aircraft very low down and fighters were vectored in. After a chase to the south-east this aircraft was shot down near Cape de Fer, Algeria.

Shadowers were again reported at 1640 hours and again one hour later but due to a failure of the R/T transmitter in Ark Royal it was not possible to vector fighters in time to intercept. An enemy report made by Italian aircraft was intercepted at 1720 hours.

At 1942/28 one of the destroyers of the screen, HMS Duncan, obtained an Asdic contact in position 37°30'N, 03°45'E. She carried out two depth charge attacks but with no apparent result. HMS Legion closed to co-operate but did not gain contact. Both ships left the area at 2012 hours to rejoin the screen.

At 2020 hours speed was reduced to 12 knots to reduce the strain on bulkheads and decks of HMS Nelson. At this time Nelson was about 8 feet down by the bows and it was estimated that 3500 tons of water had entered the ship.

At 0555/29, in position 37°30'N, 06°25'E, HMS Prince of Wales obtained an RDF surface echo ahead, and an emergency turn of 40° to port was carried out with all ships at 0609 hours. Three minutes after this turn HMS Gurkha sighted a torpedo track approaching. It was too late to alter course to avoid. A second torpedo track followed a few seconds later. Both torpedoes appeared to pass underneath the ship. HMS Gurkha then turned to port in the direction from which the torpedoes had approached and HrMs Isaac Sweers also joined to hunt the submarine. No A/S contacts were obtained and no depth charges were dropped. HMS Gurkha and HrMs Isaac Sweers rejoined the screen at 0700/29.

At 0810/29 HMS Gurkha obtained an A/S contact in position 37°26'N, 07°14'E. At 0815 hours a pattern of fourteen depth charges was dropped. Six minutes later a heavy underwater explosion was heard. At 0841 hours HMS Gurkha was ordered to rejoin screen and the hunt was abandoned.

Movements of Force X during 28/29 September on the return trip from Malta.

In the meantime the ships that are part of Force X had all fuelled at Malta and at 1500/28 the escort destroyers HMS Farndale and HMS Heythrop were sailed followed at 1615 hours by HMS Kenya, HMS Edinburgh and HMS Oribi. The remainder of Force X sailed at 1830 hours. HMS Farndale and HMS Heythrop joined Force A at 0835/29. The remainder of Force X joined Force A at 1030/29.

Movements of HMS Nelson and passage to Gibraltar.

In the meantime HMS Nelson and her three escorting destroyers were still proceeding to the west. They were joined by aircraft to provide additional A/S protection from 0730/29 onwards.

At 1909/29, HMS Duncan also obtained A/S contact and dropped one depth charge.

At 1945/29 the A/S screen was reinforced by the destroyer HMS Rockingham (Lt.Cdr. A.H.T. Johns, RN) coming from Gibraltar. Later in the evening four corvettes also joined for additional A/S protection of the damaged battleship, HMS Samphire (Lt.Cdr. F.T. Renny, DSC, RNR) joined at 2120/29, HMS Jonquil (Lt.Cdr. R.E.H. Partington, RD, RNR) at 2140/29, HMS Fleur de Lys at 2150/29 and finally HMS Arbutus (T/Lt. A.L.W. Warren, DSC, RNR) at 2340/29. Nelson's screen now consisted of four destroyers and four corvettes.

At 0130/30 HMS Samphire and HMS Arbutus obtained an A/S contact and dropped depth charges without result, the contact was probably non-sub.

At 1200/30 HMS Nelson entered Gibraltar Harbour.

Movements of Force A and Force X as of 1030 hours on 29 September.

Meanwhile after all ships of Force X had joined up with force A at 1030/29 course was shaped to the westward, keeping 40 nautical miles clear of the African coast.

At 1645/29, in position 37°26'N, 04°37'E, HMS Lively, sighted an object resembling a ship's lifeboat with mast at a range of 1000 yards. This was soon identified as the conning tower and periscope of a submarine momentarily breaking surface. Two torpedo tracks were sighted shortly afterwards. Lively immediately attacked with a pattern of fourteen depth charges at 1650 hours. HMS Legion, which was next to Lively in the destroyer screen, had already dropped a pattern of five depth charges about a minute and a half earlier. HMS Legion then joined up with HMS Lively to hunt this submarine.

At 1700 hours HMS Lively obtained a definate A/S contact and attacked with another pattern of fourteen depth charges five minutes later. After having dropped this pattern contact was regained at 1715 hours. Contact was however soon lost at and not regained. The hunt was abandoned at 1745 hours.

At 1930/29, HMS Prince of Wales, HMS Kenya, HMS Sheffield, HMS Laforey, HMS Lightning, HMS Oribi, HMS Foresight, HMS Forester and HMS Fury parted company with the rest of the force and proceeded ahead to arrive at Gibraltar p.m. 30 September 1941.
They arrived at Gibraltar at 1800/30.

At 0928/30, in position 37°10'N, 00°56'E, HMS Gurkha, obtained Asdic contact wich was confirmed as a submarine. She immediately attacked and fired a pattern if fourteen depth charges at 0935 hours. A black circular buoy with electric cable attached to it came to the surface after this attack. At 0945 hours a loud underwater explosion was heard and felt and oil started to come to the surface. Gurkha was unable to gain contact on the submarine from now on. HMS Legion who was by now assisting Gurkha in the hunt obtained contact and attacked with a fourteen depth charge pattern at 0955 hours. A second fourteen depth charge pattern was fired at 1009 hours. During Legion's second attack wreckage and oil came to the surface. Among the wreckage picked up was an Italian dictionary, a mattess, a pillow, numerous pieces of wood, some with bright screws and a piece of human scalp attached to a piece of wood by a splinter of metal. The interiors of the dictionary, the mattress and the pillow were dry. There was now no doubt that an Italian submarine was sunk by HMS Gurkha and HMS Legion.

All ships in this force entered Gibraltar harbour between 0700 and 0900 hours on 1 October.

Convoy MG 2, passage of three merchant vessels from Malta to Gibraltar.

At noon on the 26th the first out of three empty transports, the Melbourne Star (11076 GRT, built 1936), departed Malta for Gibraltar. At 1030/27 the other two ships Port Chalmers (8535 GRT, built 1933) and City of Pretoria (8049 GRT, built 1937). These last two ships were escorted by the corvette HMS Gloxinia (Lt.Cdr. A.J.C. Pomeroy, RNVR) until 1930/27. After an uneventful passage the Melbourne Star arrived at Gibraltar at 0700/29. The Port Chalmers and City of Pretoria were spotted and reported by Italian aircraft at 1200/27, shortly after leaving Malta. No enemy surface craft were seen until 2320/27 when it was believed that an E-boat was sighted by the Port Chalmers which was following in the wake of the City of Pretoria. The Port Chalmers opened fire on the E-boats bow wave with it's 4" gun. The enemy then returned fire with a machine gun. After six rounds of 4" the enemy crossed the stern of the Port Chalmers and was not seen again. The City of Pretoria had not seen the enemy at all. The action had taken place about 15 nautical miles south-south-west of Pantelleria.

At 0535/28 the Commodore of the convoy ordered he Port Chalmers to part company. Port Chalmers then proceeded at full speed, wearing French colours.

At 0915/28 an Italian Cant. 506 seaplane approached from the direction of the French north African coast and circled the City of Pretoria. This aircraft then made off to the westward and gave the Port Chalmers the same attention. Both ships were wearing French colours and had taken care to keep all service personnel out of sight. Both ships were fully ready for action, but did not open fire as the aircraft took no offensive action.

At 1015/28 the City of Pretoria was circled several times by a large three-engine seaplane, with distinct French markings, which approached from the direction of Bizerta.

At 1145/28 the City of Pretoria sighted a twin-engined Italian seaplane stopped on the water, five nautical miles to the north. She lost sight of this aircraft at 1215 hours.

The Port Chalmers was circled by an Italian aircraft at 1555/28. The aircraft did not attack.

At 1725/28 the City of Pretoria was attacked by three Italian torpedo bombers. As the aircraft approached with obviously hostile intentions the British colours were hoised and fire was opened as soon as the leader came in range. By skilful handling all three torpedoes were avoided. A submarine periscope was then reported on the starboard quarter by two independent lookouts. Three smoke floats and a depth charge set to 150 feet were dropped and under the cover of the smoke the City of Pretoria turned away.

When the City of Pretoria was approaching Cape de Gata at 0200/30 an unidentified vessel, possibly a submarine, was seen to be following. Two or three rapid shots, followed by a dull explosion, were heard. City of Pretoria made smoke and dropped smoke floats and then made close in Almeira Bay, into territorial waters, thus shaking off her pursuer.

The Port Chalmers arrived at Gibraltar at 0900/30. City of Pretoria followed during the afternoon. (1)

29 Sep 1941

Convoy WS 12

This convoy departed U.K. ports on 29 / 30 September 1941. Destination for the majority of the convoy was Aden where the convoy arrived on 20 November 1941. It was then dispersed and the remaining ships then proceeded to Suez independently.

Escort was initially provided by the heavy cruiser HMS Devonshire (Capt. R.D. Oliver, DSC, RN) (from 30 September until 14 October. On 12 October HMS Dorsetshire (Capt. A.W.S. Agar, VC, DSO, RN) joined HMS Devonshire and escorted the convoy until 14 October when it arrived at Freetown.

The aircraft carrier HMS Argus (Capt. T.O. Bulteel, RN) escorted the convoy from 30 September to 5 October when she was detached to Gibraltar, escorted by three destroyers (see below).

The armed merchant cruiser ), HMS Cathay (A/Capt.(Retd.) C.M. Merewether, RN), auxiliary minelayer HMS Agamemnon (Capt.(Retd.) F. Ratsey, RN) and the Canadian destroyers HMCS Assiniboine (A/Lt.Cdr. J.H. Stubbs, RCN), HMCS Saguenay (Lt. P.E. Haddon, RCN) escorted the convoy from 30 September to 4 October 1941 when they were detached and ordered to proceed with Halifax with the Highland Princess whih was then also detached from the convoy.

The destroyer HMS Sikh (Cdr. G.H. Stokes, RN) escorted the convoy from 30 September to 5 October when she was detached escorting HMS Argus to Gibraltar together with her sister ships HMS Cossack (Capt. E.L. Berthon, DSC and Bar, RN) and HMS Zulu (Cdr. H.R. Graham, DSO, RN) which were met at sea after they had escorted a convoy part of the way from Gibraltar to the U.K. HMS Argus and her three escorting destroyer arrived at Gibraltar on 8 October.

The destroyers HMS Lancaster (A/Cdr. N.H. Whatley, RN), HMS Newark (Lt.Cdr. R.H.W. Atkins, RN) escorted the convoy from 1 to 3 October. HMS Bradford (Lt.Cdr. J.N.K. Knight, RN) was also to be part of this group. She did sail from Londonderry but had to return to that port soon after departure owning to defects.

The destroyers HMS Gurkha (Cdr. C.N. Lentaigne, RN) and HrMs Isaac Sweers (Cdr. J. Houtsmuller, RNN) were to join the convoy on 7 October coming from Gibraltar. HrMs Isaac Sweers joined the convoy around noon but HMS Gurkha failed to find the convoy and only joined the following day.

The convoy, minus the Narkunda departed Freetown for South Africa on 19 October. Escort was provided by the heavy cruiser HMS Devonshire which joined the convoy early on 20 October after having patrolled south of Freetown since 16 October.

On 21 October 1941, HMS Royal Ulsterman and Ulster Monarch were detached and proceeded to Takoradi. As did Prince Badouin which went on to St. Helena.

On 30 October 1941 the convoy was off Capetown and the following ships of the convoy then split off to proceed into that port; Clan Campbell, Dominion Monach, Empire Pride, Empire Trust, Empress of Canada, Leopoldville, Mendoza, Perthshire, Sarpedon and Strathaird as did HMS Devonshire which went to Simonstown.

The other ships of the convoy; Empress of Russia, Franconia, Highland Brigade, Ormonde, Perseus, Richmond and Samaria then proceeded to Durban where they arrived on 3 November escorted by the armed merchant cruiser HMS Derbyshire (Capt.(Retd.) E.A.B. Stanley, DSO, MVO, RN) which had joined them off Capetown early on 31 October.

On 4 November 1941 the Strathaird departed Capetown for Durban where she arrived on 7 November.

On 8 November the following ships departed Durban and joined the Capetown group at sea; Almanzora, City of Paris, Clan Campbell, Clan Lamont, Duchess of Richmond, Empress of Russia, Franconia, Nieuw Amsterdam (36287 GRT, built 1938), Nova Scotia (6791 GRT, built 1926), Perseus, Samaria and Strathaird. The escort of the Capetown group HMS Dunnottar Castle was relieved by the battlecruiser HMS Repulse (Capt. W.G. Tennant, CB, MVO, RN) which escorted the convoy from then on to until 14 November 1941 when she was relieved by the battleship HMS Revenge (Capt. L.V. Morgan, CBE, MVO, DSC, RN) which then escorted the convoy until it arrived off Aden on 20 November. The convoy then dispersed and all ships proceeded to Suez independently.

On 14 November the convoy was joined by the Ascania (13900 GRT, built 1925) which came from Mombasa.

On 17 November 1941, HMS Glasgow (Capt. H. Hickling, DSO, RN) made rendez-vous with convoy WS 12. The Dominion Monarch, Duchess of Richmond, Empress of Canada and Perseus then split off from the convoy and continued on as convoy WS 12J towards Colombo, escorted by HMS Glasgow. This convoy arrived at Colombo on 23 November.

On 24 November the Dominion Monarch and Empress of Canada departed Colombo for Singapore as convoy WS 12V. They were escorted by HMS Glasgow until 26 November when HMS Dragon (Capt. R.W. Shaw, MBE, RN) took over the escort. The convoy arrived at Singapore on 28 November 1941. (2)

Operations by the Eastern Fleet from 29 March to 13 April 1942.
Enemy air attacks on Colombo and later Trincomalee and the loss of HMS Dorsetshire and HMS Cornwall on 5 April 1942 and HMS Hermes, HMAS Vampire on 9 April 1942.

The Japanese had been operating in the Indian Ocean in early March and more attacks were expected in this area by the Allies. The most likely target would be the island of Ceylon and the harbours of Colombo and Trincomalee.

30 and 31 March 1942.

Planning

Admiral Sommerville therefore planned to concentrate the Eastern Fleet on the late afternoon / early evening of 31 March 1942 in position 04°40’N, 81°00’E. The fleet would then be divided in two groups; Force A (the fast division) was made up of the flagships, battleship HMS Warspite, both fleet carriers, HMS Indomitable and HMS Formidable. They were escorted by the cruisers HMS Cornwall, HMS Enterprise, HMS Emerald and six destroyers; HMAS Napier, HMAS Nestor, HMS Paladin, HMS Panther, HMS Hotspur and HMS Foxhound. This force would try to intercept the enemy and deliver a night air attack on the enemy with their carriers as the main target.

Force A would be covered by the slower Force B which was made up of the battleships HMS Resolution, HMS Ramillies, HMS Royal Sovereign and the light carrier HMS Hermes. Escort to these ships was proviced by the cruisers HMS Dragon, HMS Caledon, HrMs Jacob van Heemskerck and a total of eight destroyers HMS Griffin, HMS Decoy, HMAS Norman, HMS Fortune, HrMs Isaac Sweers, HMS Arrow and one of the old destroyers that had managed to escape from the China station also joined, this was HMS Scout (Lt.Cdr.(Retd.) H. Lambton, RN). They were to remain about 20 nautical miles to the west of Force A. If Force A encountered a superior enemy force the would withdraw towards Force B.

At 1400/30 the ships mentioned earlier at the top of this article departed Colombo. HMS Hotspur and HMAS Nestor carried out an A/S sweep of the searched channel before Force A sailed.

By 1600/31 the fleet had made the pre-arranged rendez-vous and formed up. It then proceeded northwards. After dark, to avoid detection from the air by the enemy, Force A altered course to 080° and proceeded at 15 knots until about 0230 hours when it was thought they would be in the estimated position from where the enemy would fly off their aircraft for the expected attack on Ceylon. If nothing was sighted or located by 0230/1, Force A was to turn back to the south-west and to withdraw outside the enemy’s air search area. Force B was to act as a supporting force for Force A, keeping 20 miles to the west of it and confirming to the movements of Force A through the night. This procedure was carried out as planned during the night of 31 March / 1 April but nothing was seen or located.

In the late afternoon / early evening of 31 March HMS Indomitable briefly separated from the fleet for flying operations during which she was escorted by HMS Emerald. From 2100/31 to 0600/1 a search was carried out, to a depth of 120 miles from 050° to 110°, by three A.S.V. fitted Albacores from HMS Formidable. Also two Albacores fitted with long-range tanks were kept standing by for shadowing purposes if required. One of the Albacores crash landed on HMS Formidable upon return at 0340/1.

1 April 1942.

At 0940 hours HMS Decoy reported the breakdown of her main feed pumps. Dhe was detached to Colombo to effect repairs.

Around noon several of the destroyers reported submerged contacts. HMS Scout reported sighting a periscope. The fleet took avoiding action in each case, but nothing further transpired from these contact which are now considered to be non-sub.

At 1400 hours, HMS Scout, one of the oldest destroyers of the Royal Navy with a short enducance, was detached to oil at sea from RFA Appleleaf (5892 GRT, built 1917, Master E. Mills) in position 04°00’N, 80°00’E. Upon completion of oiling HMS Scout was to proceed to position 05°40’N, 81°08’E by 0800/2. RFA Appleleaf and her escort, HMS Shoreham (Cdr. E. Hewitt, RD, RNR), were to proceed towards a new waiting position 05°00’N, 80°30’E.

In the afternoon, around 1420 hours, HMS Dorsetshire joined Force A. This cruiser had been refitting at Colombo but this refit was cut short to enable her to take part in this operation. Air searches were carried out from Ceylon as the days before but they sighted nothing of the enemy. Also from 1430/1800 hours a search was carried out by aircraft from HMS Indomitable between 142° to 207° to a depth of 215 miles. Admiral Sommerville decided to carry out the same sweep to the north-east as had been done the previous night. Again nothing was seen and Force A made rendez-vous with Force B at daybreak on 2 April 1942.

2 April 1942.

At 0800 hours the destroyers HMS Fortune and HMAS Vampire were detached to fuel from RFA Appleleaf in position 05°00’N, 80°30’E. and an Albacore was ordered to search for HMS Scout and order her to rejoin the fleet. Shortly after noon the fleet sighted RFA Appleleaf, HMS Shoreham, HMS Fortune and HMAS Vampire. The last two ships then rejoined the fleet while the tanker and it’s escort were ordered to proceed towards Colombo at 1200/3.

During the day the Eastern Fleet cruised in an area about 50 miles further to the west then the previous day to avoid being detected by enemy submarines that had been reported. Throughout the day several of the escorting destroyers obtained unconfirmed echoes. Two more destroyers fuelled during the afternoon, HMAS Napier and HMS Arrow took in fuel from HMS Dorsetshire and HMS Cornwall.

As the enemy had not shown herself by 2100 hours, Admiral Sommerville decided to proceed to Addu Atoll to fuel and to take on fresh water as the R-class battleships were running out of this as they had been unable to top up at Addu Atoll before they sailed.

3 April 1942.

At 0520 hours, the destroyer HMS Fortune was detached to search for survivors from the merchant vessel Glensheil (9415 GRT, built 1924) that had been torpedoed by the Japanese submarine I-7 in position 00°48’S, 78°35’E at 0230 hours. HMS Fortune picked up 88 survivors and then proceeded to Addu Atoll where she arrived at 1130/4.

As at this time Admiral Sommerville felt confident that something must have held up the Japanese or that their intentions were incorrectly appreciated. At 0940 hours, he sent HMS Dorsetshire and HMS Cornwall to Colombo. The former to continue her refit and the latter to act as escort for the Australian troop convoy SU 4. HMS Hermes and the destroyer HMAS Vampire were also detached but to Trincomalee as HMS Hermes was to prepare for the upcoming operation ‘Ironclad’, the attack on Madagascar.

Late in the morning three of the destroyers of the screen oiled from the battleships; HMAS Norman from HMS Warspite, HMS Griffin from HMS Revenge and HMS Foxhound from HMS Royal Sovereign.

At 1820 hours Force A proceeded ahead to Addu Atoll at 19 knots followed by Force B at 15 knots. Force A arrived at Addu Atoll at 1200/4. Force B at 1500/4.

4 April 1942.

In the early morning hours, and while approaching Addu Atoll, a simulated air strike was carried out on Force B by aircraft from HMS Indomitable and HMS Formidable. One aircraft crashed into the sea, it’s crew was picked up by the Dutch AA-cruiser Jacob van Heemskerck. A second simulated air attack was made on Force A later in the morning.

At 1630 hours, Admiral Sommerville received a report that a large enemy force was in position 00°40’N, 83°10’E at 1605/F. Enemy course was 315°. Shortly afterwards this report was confirmed by another report in which they gave an enemy course of 330°. This positioned the enemy in a position 155° from Dondra Head, 360 miles, the distance from Addu Atoll being 085°, 600 miles. There was no indication about the composition of this force.

The condition of the Eastern Fleet at Addu Atoll at that time was as follows; Owning to the limited number of oilers available, the vessels comprising Force A had taken about half their fuel and Force B had not yet commenced fuelling. In addition the ‘R’-class battleships were very short of water which had to be taken in before they could sail. This meant that Force A could sail immediately, minus HMS Emerald and HMS Enterprise. These cruisers could sail shortly after midnight. Force B could not leave until 0700 hours the following morning at the earliest.

It appeared that the enemy’s probable plan was as follows. All the evidence supported Admiral Sommerville’s original appreciation that the enemy would attack Colombo (and possibly Trincomalee) with carrier borne aircraft either before dawn or shortly afterwards and would return to the carriers in a position about 150 miles south-east of Ceylon. On completion the whole force would then withdraw to the east. The enemy’s reported position made it apparent that this attack was to be made on the morning of 5 April 1942.

Admiral Sommerville considered his possible courses of action were as follows:
1) Force A, less HMS Emerald and HMS Enterprise to proceed immediately at best speed to the area to the south of Ceylon and to be joined there by HMS Dorsetshire and HMS Cornwall coming from Colombo and attack any enemy force located.
2) Delay the sailing of Force A until HMS Emerald and HMS Enterprise, valuable units with their strong torpedo armament, had completed refuelling and sail about midnight. Force B could sail in the morning of the 5th and follow astern to act as a supporting force.
3) Delay the sailing of Force A until both force could leave together on the morning of the 5th.
4) Force A and Force B would remain at Addu Atoll and leave the RAF to deal with the enemy attack.

The choise Admiral Sommerville made was governed by the following considerations:
1) First and foremost the total defence of the Indian Ocean and it’s vital lines of communication depend on the existence of the Eastern Fleet. The longer this fleet remained ‘in being’ the longer it would limit and check the enemy’s advances against Ceylon and further west. This major policy of retaining ‘a fleet in being’, already approved by Their Lordships, was, in Admiral Sommerville’s opinion, paramount.
2) The only hope of dealing the enemy an affective blow was by means of a carrier borne air striking force preferably at night. To operate both carriers escorted by HMS Warspite out of supporting distance of the ‘R’-class battleships would offer the enemy an opportunity to cripple our only offensive weapon. Admiral Sommerville considered it a cardinal point in any operation the Force A should not proceed out of the supporting distance from Force B unless it could be presumed that that enemy capital ships would not be encountered.
3) No matter what course of action Admiral Sommerville would take the enemy force could not be intercepted either before or during the attack on Ceylon on the morning of the 5th. The only hope was that the air striking force from Ceylon might inflict damage to the enemy so that the Eastern Fleet could ‘finish them off’, or that the enemy attack on Ceylon would be delayed 24 hours.

Admiral Sommerville therefore decided to adopt ‘plan 2’. So he sailed Force A including both E-class cruisers at midnight and ordered Force B to proceed as early as possible the following morning.

Admiral Sommerville therefore instructed HMS Dorsetshire and HMS Cornwall to sail from Colombo and to make rendez-vous with Force A at 1600/5 in position 00°58’N, 77°36’E. The position of this rendez-vous was based on their expected time of departure from Colombo and estimated as being the earliest possible time at which they could cross the track of Force A, taking into consideration that HMS Dorsetshire had resumed her refit and was at extended notice. Admiral Sommerville considered that the course to be steered should take them well clear of any enemy forces operating in the vicinity. Actually these instructions had been anticipated by the Deputy Commander-in-Chief, Eastern Fleet and these two cruisers, at his discretion, sailed at 2300/4 for Addu Atoll. On receipt of the signal from Admiral Sommerville the Deputy Commander-in-Chief amended his instructions accordingly at 0409/5.

5 April 1942.

Force A sailed from Addu Atoll at 0015 hours and proceeded 070° at 18 knots towards a position which would bring it 250 miles south of Ceylon by dawn on the 6th. Shortly before departure the destroyer HMS Hotspur conducted an A/S search of the entrance to Addu Atoll.

During the night Admiral Sommerville received reports from the Catalina reconnaissance aircraft on patrol from Ceylon of an enemy destroyer in position 01°59’N, 82°20’E, course 315°, speed 20 knots; six enemy destroyers in position 02°54’N, 82°10’E, course 325°, speed 21 knots; and at 0701 hours a report of one battleship, two cruisers an four other ships in position 195°, Dondra Head, 110 miles. Later this message was subsequently amplified to the effect that the vessels previously reported were definitely hostile and consisted of two battleships, two cruisers and destroyers.

At about 0825 hours an air raid on shipping and harbour facilities at Colombo was commenced in which some 75 aircraft were taking part. These were later reported to be mainly Navy ‘O’ fighters, armed with one bomb each. This enemy force withdrew from Colombo before 0900 hours and was seen by several merchant ships to the south-west of Ceylon probably returning to the carriers. In several cases these merchant were machine gunned.

From 0645 hours an air A/S patrol was maintained ahead of the fleet. HMS Indomitable also sent four Fulmars to commence a search to the eastward. This search covered the area between the arcs 055° to 105° to a depth of 215 miles. It proved negative except for the sighting of an enemy seaplane at 0855 hours, 076°, 150 miles from Force A. This suggested that the enemy was carrying out reconnaissance in a south-westerly direction by means of cruiser aircraft, or a seaplane carrier, in a position 70 miles of the main enemy force. There was no indication that this aircraft sighted any of our surface forces or our air search.

Between 0702 and 1145 hours, Admiral Sommerville received reports of battleships in approximate positions 03°55’N, 80°40’E, steering 290° at 0648 hours, steering 120° at 0730 hours, and at 1004 hours in position 04°00’N, 80°25’E steering 282°. This suggested that the battleships were making time while the carriers recovered their aircraft. The estimated position of HMS Dorsetshire and HMS Cornwall at this time was 150 miles from the enemy and opening.

At 1327 hours a mutilated ‘Shad’ signal was received from what was thought to be Colombo but was identified half an hour later as coming from HMS Dorsetshire whose position was estimated as being 037°, 90 miles from Force A at 1400 hours. No contact could be established.

At 1344 hours an enemy air formation was detected by RD/F, 030°, 84 miles from Force A. This had faded after five minutes and it later it became clear that this was the enemy attacking the Dorsetshire and Cornwall. At 1552 hours, a reconnaissance aircraft from Force A, reported wreckage in position 02°08’N, 78°08’E.

The destroyer HMS Panther was then detached to search but was recalled about one hour later when a reconnaissance aircraft from Force A reported a force of 5 ‘unknown’ ships in position 03°38’N, 78°18’E at 100 hours. There was no indication of the course or speed of the enemy but it could be either a force previously unreported or the force previously and last reported 1004 hours.

No relief shadowers were however sent off by the Rear-Admiral aircraft carriers as soon s the report was received and Admiral Sommerville omitted to obtain confirmation that this had been done. At 1700 hours, Admiral Sommerville, received a report from Ceylon that there were indications of enemy aircraft carriers steering 230° at 24 knots from an unknown position at 1400 hours. This was thought to be subsequent to the attack on our 8” cruisers and Admiral Sommerville’s deductions from this enemy moves were as follows. If the enemy held on this course they would at 0400 be in a position to deliver a night attack on Addu Atoll. This seemed quite a possible course of action. In any case it was necessary for Force A to keep clear to the southward and for Force B (estimated to be 135 miles astern of Force A) to steer to the southward so that Force A and B could close for supporting action at daylight the following morning (April 6th). It was also necessary for Force B to steer to the southward to keep clear of the enemy carrier force should it be proceeding to attack Addu Atoll.

At 1726 hours, therefore, Force A altered course to 210° at 18 knots and a signal was made to Vice-Admiral second-in-Command and to HMS Dorsetshire to steer south, although at this time Admiral Sommerville feared about the fate of the two heavy cruisers. As he had received no signal from them that they had been attacked he thought it possible they had escaped and maintained W/T silence.

At 1800 hours Admiral Sommerville received a signal from the Rear-Admiral Aircraft Carriers, stating that a reconnaissance aircraft reported the estimated enemy position as 020°, 120 miles at 1710 hours. This position was very close to the previous position reported at 1600 hours. The course of the enemy had not been given in either of these reports but the positions fitted in well with the course received earlier (230°).

At 1817 hours, a further signal was received from the Rear-Admiral Aircraft Carriers, adjusting the 1600 hours position of the enemy’s force, amplifying it to include two carriers and three unknown vessels and giving the course north-west. This was the first indication Admiral Sommerville had of the enemy now proceeding to the north-west. He immediately ordered force A to alter course to 315° and instructed the Vice-Admiral, second-in-Command to conform. These movements had to object of keeping Force A within night air striking distance of the enemy force, trusting to an A.S.V. (airborne surface vessel radar) search to locate the enemy and to bring Force B within supporting distance should it be necessary to retire in that direction. A dawn rendez-vous was arranged with Force B in approximate position 03°00’N, 75°00’E.

As no news had been received of HMS Dorsetshire and HMS Cornwall it was assumed they had been sunk.

At 1930 hours a night search with A.S.V. aircraft was commenced to cover the sector 345° to 030° to a depth of 180 nautical miles. Northing was located on this search.

6 April 1942.

From 2100/5 to 0600/6 further A.S.V. searches were carried out to cover the sector 020° to 080° to a depth of 200 miles. These searches also failed to make any contact with the enemy but reported that Force B was 220°, 25 miles from Force A at 0400 hours.

At 0615 hours, Force A altered course to 135° and sighted Force B ten minutes later. By 0720 hours the Fleet was formed up and course was altered to 090°.

Whilst no furher information had been received regarding the enemy’s movements nothing had occurred to diminish the possibility of the enemy’s being in the vicinity of Addu Atoll, either to attack it by air this morning or to await the return of the Eastern Fleet.

Admiral Sommerville intended to keep clear of the superior enemy forces by day. It was still his intention to get into a position to attack them with a night air striking force on their possible return from at Addu Atoll area, and also rescue the possible survivors from HMS Dorsetshire and HMS Cornwall. He therefore steered east and at 1115 hours course was altered to south-east in the direction of the wreckage that had been reported the previous evening. During the morning reports came in from merchant ships being attacked in the Bay of Bengal. There must be a second Japanese force operating there.

At 1300 hours HMS Enterprise, HMS Paladin and HMS Panther were detached to search for survivors in the vicinity of the wreckage position. Air search was provided to assist and fighter escort was sent to cover the operation. These ships were successful in picking up a total of 1122 survivors from both heavy cruisers. They rejoined the fleet at noon the following day. At 1800/6, when about 50 miles from the wreckage position course was reversed and the fleet retired to the north-west. All-round air searches were carried out to a depth of 200 miles but again nothing was seen.

At about 1400 hours a signal was received from the C-in-C, Ceylon estimating that a strong Japanese force was still somewhere between Addu Atoll and Colombo. Admiral Sommerville therefore decided to keep clear of the Addu area until daylight on the 7th.

7 April 1942.

At 0200 hours the Eastern Fleet altered course to the west, 270°.

At 0427 hours, an A.S.V. aircraft located two submarines in position 02°08’N, 75°16’E and 02°46’N, 75°10’E, to the southward of the course of the Eastern Fleet. This indicated that the possibility of an enemy submarine patrol having been established to cover the eastern approaches to Addu Atoll. Admiral Sommerville therefore decided to pass through Veimandu Channel to the west of the Maldives and make an unexpected approach to Addu Atoll from the west. At 0700 hours the course of the fleet was altered to 210°.

At 1335 hours, HMS Fortune was detached to investigate a ship contact made by HMS Emerald but no ship was sighted. Fortune only rejoined the fleet at about 0600/8.

At 1600 hours, HMS Enterprise, HMS Paladin and HMS Panther rejoined with the survivors they had picked up and medical stores were transferred from HMS Warspite to HMS Paladin for treatment of the wounded. Enterprise and Paladin were then detached to proceed immediately to Addu Atoll.

At 2100 hours, the Eastern Fleet altered course to 160°.

8 April 1942.

At 0700 hours aircraft were flown off from the carriers to carry out an all-round search to a depth of 175 miles. Again nothing was seen and at 1100 hours the Eastern Fleet entered Addu Atoll. Refuelling commenced immediately, Force B being refuelled first.

Admiral Sommerville held a conference on board HMS Warspite with Flag and Commanding Officers in the afternoon.

Having discussed the situation Admiral Sommerville decided to sent Force B to Kilindini and to proceed to Bombay with Force A. This later decision coincided with Their Lordships views as later in the day he received Their Lordships instructions that Force A was not to be sent to Colombo for the time being. Further by proceeding to Bombay the could arrange a meeting with the Commander-in-Chief, India and discuss the situation in the Far East with him.

At 1800 hours HMAS Nestor departed Addu Atoll to maintain an A/S patrol in the sector between 090° to 150° to a depth of 35 miles from the Port War Signal Station. One hour earlier HMS Resolution launched her Walrus aircraft for a ‘round the island’ A/S patrol. It returned at dusk.

9 April 1942.

Force B sailed for Kilindini at 0200 hours where it was due to arrive on April 15th. Force A sailed at 0600 hours for Bombay shaping course to pass to the westward of the Maldives.

During the morning Admiral Sommerville was informed of further Japanese attacks in the Bay of Bengal and on Trincomalee and the sinking of several ships, including HMS Hermes and HMAS Vampire but nothing could be done about this.

10 April 1942.

At 1000 hours HMS Panther closed HMS Warspite to transfer Staff Officers for passage to Colombo where they were to inform the Deputy Commander-in-Chief, Eastern Fleet of Admiral Sommerville’s views and make preliminary arrangements to transfer Admiral Sommerville’s administrative staff and secretariat to Kilindini.

13 April 1942.

At 0705 hours, HMS Paladin rejoined Force A bringing back the Staff Officers who had been transferred to her on 10 April and also Rear-Admiral Danckwerts, Admiral Sommerville’s Chief of Staff ashore. Force A arrived at Bombay later that morning (1040 hours) and commenced oiling.

Japanese operation in the Indian Ocean in late March 1942 and April 1942.

On 26 March 1943 the 1st Japanese Carrier Fleet departed Staring Bay, Celebes, Netherlands East Indies for a raid on Ceylon. This Fleet was made up of the aircraft carriers Akagi, Hiryu, Soryu, Zuikaku, Shokuku, battlecruisers Kongo, Haruna, Hiei, Kirishima, heavy cruisers Tone, Chikuma and the detroyers Urakaze, Tanikaze, Isokaze, Hamakaze, Kasumi, Arare, Kagero, Shiranuhi and Akigumo. This force then proceeded west of Timor and to a position to the south of Java where they fuelled from oilers on April 1st.

On 27 March the Japanese submarines I-2, I-3, I-4, I-5, I-6 and I-7 departed Penang to take up positions in the Indian Ocean for the upcoming operation.

On 1 April the Japanese Mayala Force departed Mergui for operations in the Bay of Bengal. This force was made up of the heavy cruisers Chokai, Kumanp, Mikuma, Mogami, Suzuya, aircraft carrier Ryujo, light cruiser Yura, and the destroyers Fubuki, Shirayuki, Hatsuyuki and Murakmo. On 4 April the estroyers were substituted for four other destroyers; Amagiri, Asagiri, Shirakumo and Yugiri.

Then around noon a reconnaissance aircraft from the Tone sighted the heavy cruisers HMS Dorsetshire and HMS Cornwall. The 1st Carrier Fleet immediately launched an attack force of 53 dive bombers that sank both cruisers with the loss of 424 members of their crews (Dorsetshire 234 and Cornwall 190). The Japanese then retired to the south-east.

In the evening of 5 April the Japanese Malaya-Force was ordered to commence attacking Allied shipping along the Indian east coast. On 6 April the northern group (Kumano, Suzuya and Shirakumo destroyed 9 ships off Puri (Orissa). The central group (Chokai, Yura, Asagiri and Yugiri) sank 4 ships. The southern group (Mikuma, Mogami and Amagiri sank 3 ships and damaged 2 more. Meanwhile aircraft from the carrier Ryuju, which operated with the central group, sank 4 more ships and damaged 1 more. In all about 92000 GRT of shipping was sunk.

On 8 April 1942 a Catalina aircraft spotted the Japanese 1st Carrier Fleet proceeding for an attack on Trincomalee but the Eastern Fleet was approaching Addu Atoll to refuel and could do nothing. Shipping at Trincomalee was ordered to leave port and proceed to the southward. In the morning of the following day 91 Japanese bombers and 41 fighters attacked Trincomalee. They destoyed 9 Hurricane and Fulmar fighters and 14 aircraft on the ground. The harbour most mostly empty but they sank a merchant vessel and 4 aircraft it had on board and not unloaded yet. Also the British monitor HMS Erebus (Capt. H.F. Nalder, RN) was damged. The Japanese 1st Carrier Fleet was then attacked by 9 Blenheim bombers but they inflicted no damage for 5 of their own lost to Japanese fighter cover. Then Japanese reconnaissance aircraft from the Haruna sighted ships escaping southwards. 85 Dive bombers and 3 fighters were then launched which sank HMS Hermes and HMAS Vampire as well as the corvette HMS Hollyhock (Lt.Cdr. T.E. Davies, OBE, RNR), two tankers and a merchant ship.

By mid-April 1942 all Japanese forces had returned to their bases. (4)